/**
 * @author amahmoudi
 */
$(function(){
    //Get our elements for faster access and set overlay width
    var div = $('div.sc_menu'),
                 ul = $('ul.sc_menu'),
                 // unordered list's left margin
                 ulPadding = 15;

    //Get menu width
    var divWidth = div.width();

    //Remove scrollbars
    div.css({overflow: 'hidden'});

    //Find last image container
    var lastLi = ul.find('li:last-child');

    //When user move mouse over menu
    div.mousemove(function(e){

      //As images are loaded ul width increases,
      //so we recalculate it each time
      var ulWidth = lastLi[0].offsetLeft + lastLi.outerWidth() + ulPadding;

      var left = (e.pageX - div.offset().left) * (ulWidth-divWidth) / divWidth;
      div.scrollLeft(left);
    });
});